Los Angeles daily herald., 1887-08-29
us to understand the generator subse-
auopt1v constructed ~

us to understand the generator subse-
quently constructed.
"Suppose a permanent magnet hav.
ing bundle of small tubes made OF
thin iron placed between its poles and
capable OF rotation about an axis per-
pendicular to the plane of the magnet,
after the fashion of an armature. Sup
pose, further, that by similar means,
such as a blast or draft, hot air can
be made to pass through these tubes
SO as to raise them to rejness; suppose
that by a fiat screen symmetrically
placed across the face of this bundle
of tubes. and covering one-half OF
them, access of the heated air to the
tubes beneath it is prevented.
"Then it follows that If this screen
be so adjusted that its ends are equi-
distant from the two legs of the mag
net. the bundle of tubes will not ro-
tate about the axis, since the cooler
and magnet portion of the tube-bun-
die. i. e., those beneath the screen,
will be equidistant from the poles,
and will be equally attracted on the
two sides. But if the screen be turned
about the axis of rotation so that
one of its ends is nearer
one of the poles, and the other
nearer the other, then rotation OF the
bundle will ensue, since the portion
under the screen, which is cooler and
therefore magnetizable, is continually
more strongly attracted than the other
and heated portion. This device acts,
therefore. as pyromagnetic motor,
the heat now passing through the
tubes in such way as to produce a
dissymmetry in the lines of force of
the iron field, the rotation being due
to the effort to make these symmetri-
cal The guard plate in case has an
action analogous to that of the COM
mutator in an ordinary armature.
"The results thus far obtained lead
to the conclusion that the economy of
production of electric energy from fuel
by the pyromagnetic dynamo will be
at least equal to and probably greater
than that of any OF the methods in
present use. But the actual output of
the dynamo will be less than that OF
an ordinary dynamo of the same
weight.
"To furnish thirty sixteen-candle
lights in dwelling house would pro-
ably require pyromagnetic generator
weighing two or three tons. Since,
however, the new dynamo will not
interfere with using the excess of
energy of the coal for warming the
house itself, and since their is no at
tendance required to keep it running,
there wonld seem to be already Il
large field of usefulness for it. More
over, by using the regenerative prin-
ciple in connection with it, great inn
provement may be made in its capa-
city, and its practical utility may very
probably equal the interesting scien-
tific principles which t embodies.
Mr.. Edison has now at his house at
Llewellen Park, N. s., small pyro-
magnetic dynamo that is producing
remarkable results, and he is con-
structing one that will weigh about
1900 pounds. When this is completed
he expects to be able to make expert
ments that win soon bring the dy-
namo up to high state OF perfection.
If he succeeds the days of the steam
engine in all its forms are numbered,
for it would soon become a thing of
the past and be sort of curiosity.
like the old hand fire engines and the
stage coaches of anti-railroad days.